Orientation: print upright (head on the bed) with a 2–3 mm brim.

Layer height: 0.20 mm • Walls: 4 • Top/Bottom: 4–6

Infill: 40–60 % (you can go 100% for maximum toughness)

Temps: 240 °C nozzle / 80 °C bed (tune to your filament)

Cooling: low (≈20–30%) after layer 3

If insertion is too tight, scale XY to 99–99.5% in slicer; if too loose, 100.5–101%.

Dimensions (approx.)

Head: 18.5 mm × 1.8 mm (8 mm version) • 16.5 mm × 1.8 mm (7 mm version)

Overall length: ~13.6 mm (8 mm) / ~13.1 mm (7 mm)

Barbs: 3 stepped barbs for a firm lock in ATV plastics